see what is running on port code example

Example 1: find out process using port windows

netstat -ano | findstr 8080

Example 2: find out which procses is using port linux

sudo lsof -i:<port_number>

Example 3: process runninng on particular port

sudo ss -lptn 'sport = :80'

Example 4: check which application is using port

In Windows CMD/Powershell:
netstat -aon | findstr '[port_number]'